![]() First, calculate current gestation using one of the other methods, then go to this section and choose a gestational age. Find out when your baby is due based on LMP and conception date, and using what-if you conceived on dates Plus see your pregnancy calendar based on gestational. Find out on what day your last period began, and add your average cycle. First, calculate current gestation using one of the other methods, then go to this section and choose past or future date.ĭate at future or past gestation: Use to calculate the date at a specific gestation (enter in weeks). To find your conception date, you will have to perform some calculations to estimate it. The educational health content on What To Expect is reviewed by our medical review board and team of experts to be up-to-date and in line with the latest evidence-based medical information and accepted health guidelines, including the medically reviewed What to Expect books by Heidi Murkoff. The due date is calculated by adding 40 weeks to the first day of the woman’s last menstrual period. This calculator is based on the average length of a pregnancy, which is about 40 weeks. Gestation at a future or past date: Use to calculate gestation in the future or past. A baby’s due date calculator is a tool that can be used to estimate the date when a baby will be born. The Calculator can calculate your date of conception based on: Your Due Date. Conception usually occurs around 11-21 days after the 1st day of the last period of a woman who has a regular 28 day cycle. This calculates the current gestational age and gives an estimated date of LMP.Ĭonception date: If conception is known (eg, date of insemination, ovulation or egg retrieval), then the due date can be calculated by adding 266 days. There’s a free online conception calculator that you can use The calculator helps you estimate the date your baby was conceived. Ultrasound due date: If a due date has been calculated from an ultrasound in the first trimester, the reverse calculation method is preferred. Last menstrual period (LMP): The LMP calculation uses the standard method of the first day of your last menstrual period plus 280 days to calculate the due date. The date of conception is the day on which a person's baby is conceived. This is just an estimate not a guarantee Most women, but not all, will deliver their babies within a week on. Using both the date of your last period and the length of your regular cycle, or exact date of conception, our due date calculator will quickly work out your estimated due date, tailoring it accordingly for longer, shorter, and average cycle lengths.This calculator allows you to calculate the following: The Pregnancy Conception Calculator estimates the date of conception based on the expected due date of the pregnancy, last period date, or ultrasound date. Use this calculator to find your due date. ![]() Luckily, our due date calculator can help. ![]() Unless you can pinpoint exactly what point of your ovulation cycle you were in at the time of fertilisation, it’s difficult to know how far along you are and what date you’ll meet your baby. That means that simply estimating nine months from the day you take a pregnancy test isn’t going to calculate your due date, and, even so, factoring in a few weeks here and there for ovulation won’t either. Many won’t be aware of their pregnancy until their first missed period, and by that time they could be up to five weeks in. Most expectant mothers don’t realise that both menstrual and ovulation periods count as the first two weeks of pregnancy. Our due date predictor will add 266 days (38 weeks) to the entered date. While it’s true that most pregnancies last 40 weeks, there are other factors at play which will determine your due date.
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